Process of treating ores and carboniferous earths.



UNITED OFFICE.

ALFRED A. LOCKWOOD, OF LONDON, ENGLAND.

PROCESS OF TREATING ORES AND CARBONIFEROUS EARIHS.

956, 773. No Drawing.

T 9 all whom'it may concern:

" Be it known that I, ALFRED ARTHUR Locio W601), chemist, a subject of the King of Great Britain, residing at 12 Minories, in the city of London, England, have invented a new and useful Process of Treating Ores and Carboniferous Earths, of which the following is a specification.

In a process for treating-ores in which an ore is agitated in the presence of water with an oily liquid (by which term are included animal, vegetable and mineral oils, creosote, fatty acids, soaps and mixtures thereof, and

the lilre,) in a manner adapted to coat the metalliferous portions of the ore to the exclusion of the gangu'eand subsequently separating the oiled particles 'by a process dependent on the difference of weight or powers of flotation between'fthe oiled articles. and the unoiled particl'es- -(hreina ter termed a flotation rocess) I, according to this invention ei'np 0y for thispurpose an oily liquid which has been made to contain'minute quantities of such metallic'compounds as are insoluble in Water, for the purpose of rendering them'less miscible or emulsifi'able and more adherent to and retentive of the metalliferous or 'carboniferous particles. Such ily liquids allow a greater range of minerals to be effectively treated. It has been found that one advantage of the employment of such treated oily liquids arises from the fact that when finely divided metallic compounds containing oxy en such'a's. metallic 'oxids, carbonates or s'u fates which are in-.

soluble in water are added to the oil they are not washed out from the oily mixture when this is agitated with water as is the case 'when an untreated oil is employed. .This has for effect that an oily liquid con taining an addition of such compounds may bentilized in such processes for example for the purpose of raising the specific gravity of the oily liquid in order that the metalliferous particles may be more easily and effectively coated or for other purposes. Such oily liquids are veryadherent andin some cases (especially when slimes are presentg1 it may be necessary 'to add a little acid suc as-sulfuric acid to prevent the water from becoming sick. Oily liquids are made to acquire thesequalities by treatment in general with such substances as would with a saponifiable oil form an insoluble soap I Specification of Letters Patent.

'VVhe-n itis desired'to form a mixture which Patented May a, 1910.

Application filed November 15. 1909. Serial No. 528,164.

sulfates, sulfids, chlorids, oxide or carbonates being suitable; but'whena purified.

mineral oil, such as kerosene, is in question,"

there must be present in addition to the r lluble salt some other substance such as a soluble soap or another oil or a nretallic Preferablyithe oily liquid is treated. with a soluble metallic salt such as sulfate of. alumina which can with'a saponifiable. oil

produce an insoluble soap, or with a mixture.

of a soluble metallic salt and a metallic oxid, which can form an insoluble soap.

Example 1: An oily liquid such as oil' gas tar (obtained in the manufacture of oilgas,) creosote or kerosene oil is mixed with a one to live per cent. solution of sulfate of alumina in the resence of a soluble soap. The quantity 0 soluble soa required 15.

about one to five, per cent. 0 the oil used-- and if an excess of alumina .be used it will separate out and may be used over again.

Example 2: One part of oil gas tar is agitated with two per cent. of carbonateof; lime preferably suspended in a little water.

owing to. its specific gravity will more rapidly coat an ore than hitherto more carbonate of lime may beadded to the mixture so as to brin say twenty per cent. fcourse the oil as tar might originally have been a itated with twenty per cent. of carbonate of ime but the quantit of lime which reacts with the oil is smal Coated metalliferous particles can be separated from the uncoated particles of an ore by a known oiland acld flotation process.

Exam le' 8: An' animal or yegetable'oil is mixed with five per cent! of a fire per cent. chlorid of lime milk. Alnetallic oXid' carbonate or sulfate it added to the oil liquids produced in Examples 1 and.3 wi l not be washed out from the oily liquid when agitated with water. y

In my application for Patent No. 504,530, filed June 26-, 1909, I have claimed a. process wherein the ore is agitated with a mixture com rising ,a'magn'etic oxid, water and an oily iquidwhich has been so treated with sulfate of alumina or the like that-lot said oily liquid'reta'ins an oxid, and thenmagnetically separating the mixture, while the claims-in the present application relate I 1 0 of a metallic compound insolublin water stems to a sdi fiwhat similar treatmcnt in which the crc prescnce'cf ti'ctef a metailic the 'oiled pai-ticlcs are separatcd fi rbm the compound ccritaiiningoxygen ad ed to raise unoilcd particles by a flotaticn-pr'occss; the specific avity ofthe bath and aln oily What I claim is f liquid whic has'been "made to contain a 1. In a process fox-treating ores, agitating mlnute qqantity of a metallic compound in- 20 the cm with a mixture comprismg water, soluble in water for the purpose of prean insoluble metallic com ound containing venting the washing out of the metallic oxygen arid-an oily liqui which has been compound containing dxygen, and then so treated thatit contains a'miiiute quantity j seFarating the oiled articles frbm :thQlll'b" f h f 5 th h 0i ed particles by aiihtation process.

crte urposeo frevenmg' e was 1n .I i i but cf sa i d insoluble inetallic. compound, an 'L' then separating the; oiled particles from the Witnesses; V nailed particlesvby'a flotation process. I V I "MARCUS B. ArSAMUEL In a process fqg t gting ores, agitating Y D, JAM SONJ 

